Fifths to benjamin o neill



(No Model.) 2 sheets-sheet 1. E. J. BRINKMAN.

vMIDDLIlYrGfs PURIPIER.

No. 351,307. Patented Oct. 19, 1886.

111ml!!! llnllllllnlllmn N. PUEHS. Phnwmhagmpher, wnhmgmm D, (I

(No Model.) 2 Sheets-Sheet 2.

H. J. BRINKMAN.

MIDDLINGS PURIPIER.

No. 351,307. Patented Oct. 19, 1886.

N. PUERS. PMwLilhognpher. washington. n.0.

UNITED STATES l PATENT OFFICE.

HENRY J. BRINKMAN, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR OF 'IVVO-V FIFTHSTO BENJAMIN ONEILL, OF SAME PLACE.

MIDDLINGS-PURIFIER.

SPECIFICATION forming part o Letters Patent No. 351,307, dated' October19, 1886.

Serial No. 188,707. (No model.)

To all whom it may concern.-

Be it known that I, HENRY J. BEINKMAN, a citizen of the United States,and a resident of Minneapolis, in the county of Hennepin and State ofMinnesota, have invented certain Improvements in Middlings-Purifiers, ofwhich thefollowing is a specification.

My invention consists, generally, in the construction and combinationhereinafter described, and particularly pointed out in the claims.

In the drawings forming part of this specification, Figure 1 is aVertical section of a Inachine that l have devised for carrying out myinvention. Fig. 2 is a sectional end elevation of the same, Fig. 3, adetail of a modification. Fig. 4 is an enlarged detail.

In the drawings, 2 represents the casing of the machine, which is ofsuitable shape and construction. Within this casing is a vertical frame,3, that is hung upon links 5, pivoted to the frame and to the innerwalls of the casing or frame of the machine. Eccentric-shafts 7 arejournaled upon the outside of the casing, and connecting-rods 9 passfrom the shafts into the casing and are connected to the frame 3. Theshafts 7 are connected by belts 11, by which power is communicated fromone shaft to the other. In order that the eccentrics may move in unison,I provide a connectingrod that is connected to a crank-pin upon a diskon the end of each crank-shaft. These eccentric-shafts are driven at ahigh rate of speed, and they give to the suspended frame a rapidvibratory motion.

In the frame 3 are a series of inclined screens, formed of boltingsilkor otherscreening material. This silk is preferably secured by tackingit to wooden strips or bars 16, fastened to the frame 3. A corrugatedmetal plate, 19, is arranged at a short distance from the silk, and on aplane substantially parallel with its surface. Ihese plates are securedto the frame 3 in any suitable manner. I provide the inclined valves 25,which extend the full Width ofthe screen and are pivoted to the sides ofthe frame 3. The material that goes over the screens falls upon thesevalves and slides down their inclined surface onto conductors 27,arranged at the upper end of each screen below the rst one. From theconductors 27 the material falls onto the upper part of the screenbelow, and so on through the machine. I prefer to arrange an inclinedconductingboard, 29, beneath the upper part of each screen. This boarddirects the material that passes through the screen onto the upper partof an inclined plate or board, 23, that extends from the lower end ofone screen t0 the top of the next. Upon the board 23 are gather-boards24., which direct the material into spouts 31, there being preferably aseparate spout for each section of the screen. These spouts are providedwith the valves 33, by means of which the material may be directed intoany spout or spouts desired.

I provide means for jarring each section of the screen,in order to clearthe same. A series of shafts, 35, are journaled across the frame in therear of the screens, as shown in Figs. 1 and 4. Each of these shafts isprovided with a knocker, 37, one at each side of the frame, in line withthe strips to which the cloth is secured. Upon these strips I place thearched metal plates or bumpers 39, opposite the knockers on the shafts.The shafts revolve at a slow rate of speed, and when the knockers are inposition nearest the frame 3 the bumpers are brought against the ends ofthe knockers, thereby giving a slight jar to the section of the screen,which knocks oft' any adhering material. The knockcrs are preferablyarranged at different points on the several shafts, so that only one setof knockers is in position for operating at the same time.

rIhe shafts 35 are driven by a chain, 11, that passes oversprocket-wheels on the ends of the shafts. This chain preferably passesupon one side of one shaft and the opposite side of the next, as shownin Fig. 4.

A suction-fan, 21, is located in the casing, preferably near the lowerend thereof, and the casing is made With closed Walls on that side ofthe frame 3 in which the fan is located.

The other side of the casing is open, so that so as to regulate thecurrent through the screens.

As the frame .is rapidly vibrated back and forth the material is thrownfrom the surface of the silk into and against the corrugations Thisaction detaches the 25. The current from the top of the plate passesover the conductor 27 vand throughthe material that falls from the valve251 onto this conductor. This current also takes with' it some of thelight or fluffy material.V A portion of the air is also drawn-throughthe space above the valve 25. The result is that thelight:material-bran-scales, &c.-is fully detached from the middlings orgrits,without causing the latter to iiour, and the materialV isthoroughly exposed to the air-currents,where by the light stuff iscarried away.

The plate or board 23 may have'an opening through it,which is covered bya hinged'valve, 24, as shownin Fig. 4. When this valve is raised, airpasses through theV sheet of material as it falls from the edge of t-hevalve,'and carries with it through the plateanysmall specks of lightmaterial that may pass through the cloth. This portion ofthe currentpasses over the edge of the valve 25 andiaids in aspiratin g thematerial that falls from 4the screen:

Instead of the corrugated plate, IA may use as beater' barsor surfaces aseries of stripsth'at extend across the screens, at a short distancetherefrom and in substantially ,th-e positionnecupied by the lower partsofthe corrugations of the metal plates, as shown in Fig. 3. VThematerial will be thrown back and forth between the silk and these bars,and the air-'cur rent will pass directly through them, carrying thelight material with it. The corrugated plates may be provided with aseries ofopenf` ings, and with regulating-valves, if desired. In eachinstance as the material passes down theinclined screfns it is thrownagainst beatersurfaces and at the same time subjected to a current ofair that passes upward through the v screen. The several screens orsections areof progressively coarser mesh from the top toward thebottom.

A spiral conveyer, 8l, is arranged beneath the screens to carry out thematerial that falls from the lower screen.

Iprefer to provide an opening, 89.in the wall of the casing, which maybe provided with asui table regulatin g-valve, th rough which air isadmitted between Ythe screens and the fan when it is desired to lessenthe force of the current through the screens.

A suitable hopper is secured to the top of the main frame or casing. Itis provided with a suitablegate, and the top of the frame 3 is providedwith a feed-board, 85, over which the material is fed. An inclinedboard, 87, is arranged beneath the feed-board, and aids in directing thematerial into the space between the silk and the corrugated plate.

l It will be seen that the screens are arranged at a greater inclinationthan is usual in machines of` thisA class. By this arrangement as thematerial passes down the screens smaller openings arepresented, to itthan'when` the inclination is less, while the openings are-presented infull size to the ai rJCurreuts.

I' claim as myinvention- 1. In a.middlings.purifier, the combination, iwith avibrating frame, ofi one or more inclined ,frame andtheseries'oil` inclined screens carri'ed-'by said frame, ofthecorrugated plate arrangedin said frame over said screens, and meansfor producing al current of air through said screens, substantially asdescribed.

3. The combination, in a middlings-puriiier, with thevertical framesupportedfuponl hangers, and means for'vibrating saidfram'e, oftheseries of inclined screens carried'by said frame, the corrugated plates:secured to said frame over said screens,valves arranged below'saidplates, and mea-ns for producing a current' of air through said screens,substantially as described.

4. The combination, in a middlin'gsLpuritier, with a vertical framesupported `upon* hangers, and means for vibratingsaid frame, of theseries of incli ned screens carried by saidsframe, a series of' bumpers,39, on 'saidv frame, a series of shafts, 35, and knockers 37, arrangedat different angles on said shafts and adapted to engage said bumpers,for the purpose set forth. 5l The combination, in amiddlings purifier,of avibrating frame, aseries of inclined screens carried by said frame,a series of -beatersplates mounted in saidl frame over said screens, andmeans for producing a current'of air through said screens, substantiallyas described.

HENRY J. BRINKMAN. vVVit'nesses:

A. C PAUL, R. H. SANFORD.

IOO

